Efficient charge separation and visible-light response of two-dimensional Janus group-III monochalcogenide multilayers

2021 ◽  
Author(s):  
Yujie Bai ◽  
Rongfeng Guan ◽  
Haiyang Zhang ◽  
Qinfang Zhang ◽  
Ning Xu
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Light Response ◽  
Two Dimensional ◽  
Excellent Performance ◽  
Electron Hole ◽  
Group Iii ◽  
Efficient Separation ◽  
Visible Light Response ◽  
Efficient Charge

The Janus group-III monochalcogenide multilayers with enhanced built-in electric field exhibit excellent performance in harvesting sunlight and efficient separation of electron–hole pairs.

scholarly journals Efficient charge separation and visible-light response in bilayer HfS2-based van der Waals heterostructures

RSC Advances ◽  
2018 ◽  
Vol 8 (34) ◽  
pp. 18889-18895 ◽  
Author(s):  
Biao Wang ◽  
Xukai Luo ◽  
Junli Chang ◽  
Xiaorui Chen ◽  
Hongkuan Yuan ◽  
...  
Keyword(s):  
Charge Separation ◽  
Density Functional ◽  
Van Der Waals ◽  
Light Response ◽  
Hybrid Density Functional Theory ◽  
Functional Theory ◽  
Visible Light Response ◽  
Efficient Charge ◽  
Hybrid Density Functional ◽  
Photocatalytic Applications

In this work, we employ hybrid density functional theory to investigate HfS2-based van der Waals (vdW) heterojunctions for highly efficient photovoltaic and photocatalytic applications.

scholarly journals Au@CoS-BiVO4 {010} Constructed for Visible-Light-Assisted Peroxymonosulfate Activation

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1414
Author(s):  
Yekun Ji ◽  
Ye Zhou ◽  
Jinnan Wang ◽  
Aimin Li ◽  
Weilin Bian ◽  
...  
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Reaction System ◽  
Light Response ◽  
Pilot Scale ◽  
Sulfate Radical ◽  
Radical Trapping ◽  
Visible Light Response ◽  
Photogenerated Electrons ◽  
Scale Experiment

A visible-light-Fenton-like reaction system was constructed for the selective conversion of peroxymonosulfate to sulfate radical. Au@CoS, when doped on monoclinic BiVO4 {010} facets, promoted spatial charge separation due to the different energy band between the m-BiVO4 {010} and {110} facets. The visible-light response of m-BiVO4 was enhanced, which was attributed to the SPR effect of Au. And the photogenerated electrons were transferred from the m-BiVO4 {010} facet to Au via a Schottky junction. Owing to higher work function, CoS was able to capture these photoelectrons with acceleration of the Co(Ⅱ)/Co(Ⅲ) redox, enhancing peroxymonosulfate conversion to sulfate radical (Co2+ + HSO5−→ Co3+ + •SO4− + OH−). On the other hand, holes accumulated on m-BiVO4 {110} facets also contributed to organics oxidation. Thus, more than 95% of RhB was degraded within 40 min, and, even after five cycles, over 80% of RhB could be removed. The radical trapping experiments and EPR confirmed that both the sulfate radical and photogenerated hole were the main species for organics degradation. UV-vis DRS, photoluminescence (PL) and photoelectrochemical analyses also confirmed the enhancement of the visible-light response and charge separation. In a pilot scale experiment (PMS = 3 mM, initial TOC = 151 mg/L, reaction time = 4 h), CoS-Au-BiVO4 loaded on glass fiber showed a high mineralization rate (>60%) of practical wastewater.

Efficient band structure tuning, charge separation, and visible-light response in ZrS2-based van der Waals heterostructures

2016 ◽  
Vol 9 (3) ◽  
pp. 841-849 ◽  
Author(s):  
Xirui Zhang ◽  
Zhaoshun Meng ◽  
Dewei Rao ◽  
Yunhui Wang ◽  
Qi Shi ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Van Der Waals ◽  
Light Response ◽  
Van Der Waals Heterostructures ◽  
Visible Light Response

Bilayer ZrS2-based vdW heterostructures are proposed as efficient photocatalysts for water splitting under visible light.

scholarly journals Preparation and Property of Mo-Doped Visible-Light Response Titaniumdioxide Photocatalyst

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Yingying Li ◽  
Xianliang Song ◽  
Zhedong Wei ◽  
Jianguang Zhang ◽  
Lijuan Qin ◽  
...  
Keyword(s):  
Visible Light ◽  
Crystal Lattice ◽  
Raw Materials ◽  
Light Response ◽  
Ammonium Molybdate ◽  
Electron Hole ◽  
Degradation Study ◽  
Visible Light Response ◽  
Photocatalytic Activities ◽  
Visible Light Photocatalytic

Mo-titaniumdioxide (P25) photocatalyst with visible-light response was prepared with the ammonium molybdate for Mo source and titaniumdioxide for the raw materials by the method of dissolving and calcining. The photocatalysts’ structure was characterized by XRD, XPS, and UV-Vis absorption spectrum and TEM. The photocatalytic activities of Mo-titaniumdioxide were measured by the degradation of methylene blue (MB) under visible-light irradiation. The results showed that Mo characteristic peaks appeared at the point of 235.45 eV, 234.2 eV, 232.3 eV, and 231.1 eV. In Mo-titaniumdioxide crystal lattice, Mo6+had the highest percentage (about 84.08%), indicating that Mo element was inserted into titaniumdioxide crystal lattice and considerable amount of Mo dopant was in the 6+ valence state, which restrained the recombination of electron-hole and had the visible-light photocatalytic activity. Photocatalytic degradation study indicated that the samples prepared at calcination temperature of 500°C were used to degrade MB; after 3 h, the degradation reached up to 80.67%.

Propose two-dimensional Sb2Te2X (X = S, Se) with isotropic electron mobility and remarkable visible-light response

2019 ◽  
Vol 21 (27) ◽  
pp. 14904-14910 ◽  
Author(s):  
Yan Liang ◽  
Jianwei Li ◽  
Hao Jin ◽  
Baibiao Huang ◽  
Ying Dai
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Electron Mobility ◽  
Light Response ◽  
Two Dimensional ◽  
Electronic And Optical Properties ◽  
Photovoltaic Materials ◽  
Visible Light Response

The highly desired electronic and optical properties of the proposed 2D Sb2Te2X compounds place them in the realm of electronic and photovoltaic materials.

Sign in / Sign up

Export Citation Format

Share Document